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Piezoelectric strain control of terahertz spin current
Citation
Chaurasiya, A., Li, Z., Medwal, R., Gupta, S., Mohan, J. R., Fukuma, Y., Asada, H., Chia, E. E. M., & Rawat, R. S. (2022). Piezoelectric strain control of terahertz spin current. Advanced Optical Materials, 10(24), Article 2201929. https://doi.org/10.1002/adom.202201929
Author
Chaurasiya, Avinash
•
Li, Ziqi
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Medwal, Rohit
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Gupta, Surbhi
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Mohan, John Rex
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Fukuma, Yasuhiro
•
Asada, Hironori
•
Chia, Elbert E. M.
•
Abstract
Electrical control of photogenerated terahertz (THz) spin current pulses from a spintronic emitter has been at the forefront for the development of scalable, cost-efficient, wideband optospintronic devices. Artificially combined ferroelectric and ferromagnet heterostructure provides the potential avenue to deterministically control the phase of THz spin current pulse through piezoelectric strain. Here, the electric field-mediated piezoelectric strain control of photogenerated THz spin current pulse from a multiferroic spintronic emitter is demonstrated. The phase reversal of the THz spin current pulse is obtained from the combined effect of piezoelectric strain and a small magnetic field applied opposite to the initial magnetization of the ferromagnet. The piezoelectric strain-controlled phase switching of THz spin current thus opens a door to develop efficient strain engineered scalable on-chip THz spintronics devices.
Date Issued
2022
Journal
Advanced Optical Materials
DOI
10.1002/adom.202201929
Project
ARC 1/19 RSR
CRP21-2018-0003
Grant ID
MOE2018-T3-1-002
NRF-CRP22-2019-0004
KAKENHI Nos. 18H01862a and 19K21112
Funding Agency
Ministry of Education, Singapore
National Research Foundation, Singapore
JSPS Grant-in-Aid